Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Chemistry |
Creator |
Morse, Michael David |
Other Author |
Brugh, Dale J.; DaBell, Ryan S. |
Title |
Vibronic spectroscopy of unsaturated transition metal complexes: CrC?H, CrCh?, and NiCH? |
Date |
2004 |
Description |
Vibronically resolved resonant two-photon ionization and dispersed fluorescence spectra of the organometallic radicals CrC2H, CrCH3 , and NiCH3 are reported in the visible and near-infrared wavelength regions. For CrC2H, a complicated vibronic spectrum is found in the 11 100?13 300 cm-1 region, with a prominent vibrational progression having ?'e=426.52?0.84 cm-1, ?'ex'e 50.74?0.13 cm-1. Dispersed fluorescence reveals a v"=1 level of the ground state with ?G"1/2=470?20 m-1. These vibrational frequencies undoubtedly pertain to the Cr?C2H stretching mode. It is suggested that the spectrum corresponds to the A? 6?1+ ? X? 6?+ band system, with the CrC2H molecule being linear in both the ground and the excited state. The related CrCH3 molecule displays a vibronic spectrum in the 11 500?14 000 cm-1 region. The upper state of this system displays six sub-bands that are too closely spaced to be vibrational structure, but too widely separated to be K structure. It is suggested that the observed spectrum is a 6E?X? 6A1 band system, analogous to the well-known B 6II?X 6?+ band systems of CrF and CrCl. The ground state Cr?CH3 vibration is characterized by ?'e=52?17 cm-1 and ?'ex'e=7.9?6 cm-1. The spectrum of NiCH3 lies in the 16 100?17 400 cm-1 range and has ?"e=455.3?0.1 cm21 and ?"ex"e=6.60 ?0.03 cm-1. Dispersed fluorescence studies provide ground state vibrational constants of ?"e=565.8?1.6 cm-1 and ?"ex"e+1.7?3.0 cm-1. Again, these values correspond to the Ni?CH3 stretching motion. |
Type |
Text |
Publisher |
American Institute of Physics (AIP) |
Volume |
121 |
Issue |
24 |
First Page |
12379 |
Last Page |
12385 |
DOI |
10.1063/1.1821497 |
Language |
eng |
Bibliographic Citation |
Brugh, D. J., DaBell, R. S., & Morse, M. D. (2004). Vibronic spectroscopy of unsaturated transition metal complexes: CrC?H, CrCh?, and NiCH?. Journal of Chemical Physics, 121(24), 12379-85. |
Rights Management |
©American Institute of Physics. The following article appeared in Brugh, D. J., DaBell, R. S., & Morse, M. D. (2004). Vibronic spectroscopy of unsaturated transition metal complexes: CrC?H, CrCh?, and NiCH?. Journal of Chemical Physics, 121(24), 12379-85. and may be found at DOI: 10.1063/1.1821497. |
Format Medium |
application/pdf |
Format Extent |
114,492 bytes |
Identifier |
ir-main,16921 |
ARK |
ark:/87278/s6q24hh5 |
Setname |
ir_uspace |
ID |
703880 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6q24hh5 |